The invention relates to a temperature exchanging element made by extrusion and able to receive a heating element and/or heat conducting element, and radiation fins. It is constituted of a single-piece base incorporating an external face equipped with means to receive the radiation fins, and an inner face equipped with at least one means to integrate the heating and/or heat conducting element, said reception and integration means being made during the extrusion of the base. Application to the manufacture of a radiation module, a dryer, an air conditioner, a solar energy collection device.